PDF malware analysis — malicious · d56ff70280a012f5

MALICIOUS

PDF

47.2 KB Created: 2021-05-17 06:07:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: 9f1b470633097ea4aca33821f827a9d7 SHA-1: 0c7b6a6e6a0716223decbda5b5d98f64485e3d84 SHA-256: d56ff70280a012f55bb7b375dbc668dab65f0c9a4a846c79c89fdc1ebba1fecd

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to websites offering game cheats and generators, with one primary link identified as a malicious redirector. The document body and embedded links suggest a lure for users seeking in-game currency or hacks, which is a common social engineering tactic. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.8948

Heuristics 5

PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE

PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://netcdn.xyz/app/406889139/coin-master-cheats-free-game-hack In PDF document text
- https://www.sharmagoa.com/uploaded_files/userfiles/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
- https://www.sharmagoa.com/uploaded_files/userfiles/files/wurst-commands_GM479516143.pdfIn PDF document text
- https://www.sharmagoa.com/uploaded_files/userfiles/files/roblox-avatar-com_GM431946152.pdfIn PDF document text
- https://www.sharmagoa.com/uploaded_files/userfiles/files/coin-master-instagram-free-spins_GM406889139.pdfIn PDF document text
- https://www.sharmagoa.com/uploaded_files/userfiles/files/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
- https://www.sharmagoa.com/uploaded_files/userfiles/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.sharmagoa.com/uploaded_files/userfiles/files/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://www.sharmagoa.com/uploaded_files/userfiles/files/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
- https://www.sharmagoa.com/uploaded_files/userfiles/files/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.sharmagoa.com/uploaded_files/userfiles/files/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
- https://www.sharmagoa.com/uploaded_files/userfiles/files/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
- https://www.sharmagoa.com/uploaded_files/userfiles/files/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
- https://www.sharmagoa.com/uploaded_files/userfiles/files/how-to-earn-robux-by-playing-games_GM431946152.pdfIn PDF document text
- https://www.sharmagoa.com/uploaded_files/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
- https://www.sharmagoa.com/uploaded_files/userfiles/files/bloxpage-free-robux_GM431946152.pdfIn PDF document text
- https://www.sharmagoa.com/uploaded_files/userfiles/files/free-robux-gen_GM431946152.pdfIn PDF document text
- https://www.sharmagoa.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
- https://www.sharmagoa.com/uploaded_files/userfiles/files/free-apk-mods-coin-master_GM406889139.pdfIn PDF document text
- https://www.sharmagoa.com/uploaded_files/userfiles/files/free-spins-and-coins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.sharmagoa.com/uploaded_files/userfiles/files/get-free-roblox_GM431946152.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004c22.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4C22	24816 bytes
SHA-256: `fd81962c0c170d1230ad87dc2c27fed0f5b1c1746d3b2789822a61fb81457969`
`font_01_sfnt_off00008579.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8579	7332 bytes
SHA-256: `d811e0aca85f3b94c42cd1240eec68b8eb378f3d8be5e408d3f6abd0f11f834d`
`font_02_sfnt_off00009792.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9792	17876 bytes
SHA-256: `3080be39145a7e19e49f31c27d216b7ef11c5a53cf2903de633486ff32396878`

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